WLRN-FM is a class C1 FM station on 91.3 and is the main public radio station for South Florida and the Keys based in Miami. The station is owned by the Miami-Dade County Public Schools and is the area's NPR member station. WLRN first signed on in 1948 as WTHS-FM, on 91.7 MHz. The station later moved to 91.3, changing the calls to WLRN-FM. It was a charter member of NPR in 1970, and is the longest running NPR member in Florida. The station also maintains its long-time radio reading service for the blind on an analog subcarrier.